8 Contents of messages

23.0183GPPBasic call handlingRelease 15Technical realizationTS

This clause specifies the content of each message shown in clauses 5 and 7, except for the following messages, which are not specific to call handling:

On the D interface (VLR-HLR):

– Abort;

– Activate Trace Mode;

– Authentication Failure Report;

– Insert Subscriber Data;

– Send Authentication Info;

– Send Authentication Info ack;

– Send Authentication Info negative response;

In the tables which follow, information elements are shown as mandatory (M), conditional (C) or optional (O). A mandatory information element shall always be present. A conditional information element shall be present if certain conditions are fulfilled; if those conditions are not fulfilled it shall be absent. An optional element may be present or absent, at the discretion of the application at the sending entity.

Some messages which are defined in this clause are used for other services or features. The specifications (referred to below as "derived specifications") for those services or features may simply refer to the present document for the definition of the message; in this case the requirements for the presence of each information element are as defined in this clause. If the specification for a service or feature requires information elements in a message additional to those specified in this clause, the requirements for the presence of the additional information elements are specified in the relevant specification. If the specification for a service or feature has different requirements for the presence of an information element in a message which is specified in this clause, then the following principles apply:

– If the information element is shown as mandatory in this clause, it shall always be present.

– If the information element is shown as conditional or optional in this clause, but mandatory in the derived specification, it shall always be present in the context of the service or feature defined in the derived specification.

– If the information element is shown as conditional or optional in this clause, and the conditions in the derived specification require the information element to be present, it shall be present even if the conditions in this clause do not require it to be present.

8.1 Messages on the B interface (MSC-VLR)

8.1.1 Abort

The following information element is required:

Information element name

Required

Description

Abort reason

M

Indicates the reason for the procedure being aborted.

8.1.2 Authenticate

The following information elements are required for authentication of a UMTS UE:

Information element name

Required

Description

RAND(I)

M

Random number challenge to be sent to the MS (3GPP TS 33.102 [32])

AUTN(I)

M

Authentication token to be sent to the MS (3GPP TS 33.102 [32])

The following information elements are required for authentication of a GSM MS:

Information element name

Required

Description

RAND

M

Random number challenge to be sent to the MS (3GPP TS 43.020 [1])

CKSN

M

Cipher key sequence number to be sent to the MS (3GPP TS 43.020 [1])

8.1.3 Authenticate ack

The following information element is required for authentication of a UMTS UE:

Information element name

Required

Description

RES(I)

M

Result returned by the MS (3GPP TS 33.102 [32])

The following information element is required for authentication of a GSM MS:

Information element name

Required

Description

SRES

M

Signature result returned by the MS (3GPP TS 43.020 [1])

8.1.4 Authenticate negative response

The negative response information element can take the following value:

– wrong network signature.

8.1.5 Call arrived

This message contains no information elements.

8.1.6 Check IMEI

This message contains no information elements.

8.1.7 Check IMEI ack

The following information element is required:

Information element name

Required

Description

Equipment status

M

Indicates whether the ME is black-listed, grey-listed or white-listed

8.1.8 Check IMEI negative response

The negative response information element can take the following values:

– System failure;

– Unknown equipment.

8.1.9 Complete Call

The following information elements are required:

Information element name

Required

Description

MSISDN

C

MSISDN of the MS for which the Complete Call is sent. Shall be present for an ordinary MO call, for an MT call and for an emergency call when the MS is registered in the VLR; otherwise shall be absent.

IMEI

C

IMEI of the mobile for which the Complete Call is sent. Shall be present for an emergency call when the mobile is identified only by its IMEI; otherwise shall be absent.

Category

C

Category of the MS for which the Complete Call is sent. Shall be present for an ordinary MO call and for an emergency call when the MS is registered in the VLR; otherwise shall be absent.

PLMN bearer capability

C

Shall be present for an MT call according to the rules defined in 3GPP TS 29.007 [30].

ISDN bearer capability

C

Shall be present for an MT call if it was received in the Provide Roaming Number; otherwise shall be absent.

ISDN low layer compatibility

C

Shall be present for an MT call if it was received in the Provide Roaming Number; otherwise shall be absent.

ISDN high layer compatibility

C

Shall be present for an MT call if it was received in the Provide Roaming Number; otherwise shall be absent.

CLIP provision

C

Indicates that CLIP is provisioned. Shall be present for an MT call if CLIP is provisioned; otherwise shall be absent.

CLIR override provision

C

Indicates that the CLIR override subscription option of CLIP is provisioned. Shall be present for an MT call if CLIP is provisioned with the CLIR override subscription option and the MS is registered in the HPLMN country; otherwise shall be absent.

CLIR provision

C

Indicates that CLIR is provisioned. Shall be present for an MO call if CLIR is provisioned; otherwise shall be absent.

CLIR mode

C

Indicates the mode in which CLIR is provisioned: permanent, temporary (default presentation allowed) or temporary (default presentation restricted). Shall be present for an MO call if CLIR is provisioned; otherwise shall be absent.

COLP provision

C

Indicates that COLP is provisioned. Shall be present for an MO call if COLP is provisioned; otherwise shall be absent.

COLR override provision

C

Indicates that the COLR override subscription option of COLP is provisioned. Shall be present for an MO call if COLP is provisioned with the COLR override subscription option and the MS is registered in the HPLMN country; otherwise shall be absent.

COLR provision

C

Indicates that COLR is provisioned. Shall be present for an MT call if COLR is provisioned; otherwise shall be absent.

No Reply Condition Timer

C

Value of timer to be used to determine the No subscriber reply condition. Shall be present for an MT call if the Call Forwarding on No Reply service is active and operative; otherwise shall be absent.

CUG index

C

For the definition of this IE, see 3GPP TS 23.085 [18]. May be present (as a network operator option) for an ordinary MO call if the call is a CUG call; shall be present for an MT call if the call is a CUG call; otherwise shall be absent.

CUG interlock

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present for an ordinary MO call if the call is a CUG call; otherwise shall be absent.

CUG outgoing access

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present for an ordinary MO call if the call is a CUG call with outgoing access; otherwise shall be absent.

Advice of Charge provision

C

Indicates whether Advice of Charge (Information) or Advice of Charge (Charging) is provisioned. Shall be present for an ordinary MO call or an MT call if Advice of Charge is provisioned; otherwise shall be absent.

Alerting Pattern

C

Shall be present for an MT call if it was received in the Provide Roaming Number and if the feature is supported by the MSC/VLR; otherwise shall be absent.

NAEA preferred Carrier Id

O

The preferred carrier identity identifying the carrier to be used to route the interexchange call if the call requires routing via an interexchange carrier. This parameter may be included at the discretion of the VLR operator.

8.1.10 Complete Call ack

This message contains no information elements.

8.1.11 Complete Call negative response

The negative response information element can take the following values:

– Absent subscriber;

– Busy subscriber;

– No subscriber reply;

– Radio congestion.

8.1.12 Forward New TMSI

The following information element is required:

Information element name

Required

Description

TMSI

M

TMSI to be sent to the MS.

8.1.13 Forward New TMSI ack

This message contains no information elements.

8.1.14 Forward New TMSI negative response

The negative response information element can take the following value:

– TMSI reallocation failure.

8.1.15 Obtain Subscriber Info

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the MS for which information is required.

Subscriber state requested

C

Indicates that the VLR requires state information for the MS. Shall be present if state information is required; otherwise shall be absent.

8.1.16 Obtain Subscriber Info ack

The following information elements are required:

Information element name

Required

Description

Subscriber state

C

Indicates whether the MS is busy (i.e. engaged on a circuit-switched call) or assumed idle. Shall be present if the VLR requested state information; otherwise shall be absent.

8.1.17 Page MS

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the MS to be paged.

Location area ID

M

Location area in which the MS is to be paged.

Page type

M

Indicates whether the paging is for a circuit-switched call, MT SMS delivery, SS activity or Active Location Retrieval.

Requested information

C

Indicates the information requested by the VLR – one or more of:

– Location;

– MS classmark;

– IMEI.

Shall be present if the Page type is Active Information Retrieval; otherwise shall be absent.

Paging via SGSN possible

C

Indicates that paging via the SGSN is possible. Shall be present if the VLR determines that the MS can be paged via the SGSN; otherwise shall be absent.

TMSI

O

TMSI to be broadcast to identify the MS.

Call Priority

O

This parameter indicates the eMLPP priority of the call (see 3GPP TS 23.067 [39]). This parameter should be present if the VLR supports the eMLPP feature and if the Call Priority was received in the MAP_PROVIDE_ROAMING_NUMBER request or in the MAP PROVIDE_SUBSCRIBER_INFO request.

8.1.18 Page MS ack

The following information elements are required:

Information element name

Required

Description

Location area ID

M

Location area in which the MS responded to the page.

Serving cell ID

M

Identity of the cell in which the served subscriber is located. Shall be present if the MS uses GSM radio access; otherwise shall be absent.

Service area ID

C

Service area identity of the cell in which the served subscriber is located. Shall be present if the MS uses UMTS radio access; otherwise shall be absent.

MS classmark

M

MS classmark 2 as defined in 3GPP TS 24.008 [26].

IMEI (with software version)

C

IMEISV as defined in 3GPP TS 23.003 [5]. Shall be present if the IMEI was requested in the Page MS message and the MSC retrieved it from the MS; otherwise shall be absent.

8.1.19 Page MS negative response

The negative response information element can take the following values:

– Absent subscriber;

– Busy subscriber (More calls possible);

– Busy subscriber (NDUB);

– System failure;

– Unknown location area ID.

The Page MS negative response Busy subscriber (More calls possible) also indicates the basic service which applies for the established call.

8.1.20 Page MS via SGSN

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the MS to be paged.

eMLPP priority

O

Circuit-switched paging priority.

TMSI

O

TMSI to be broadcast to identify the MS.

Channel type

O

Type of channel required for the call.

8.1.21 Process Access Request

The following information elements are required:

Information element name

Required

Description

CM service type

M

Indicates the type of access required: normal MO call, emergency call or page response. Other values (short message service and SS request) defined for this IE are not considered in the present document.

Access connection status

M

Indicates whether or not the connection to the MS is ciphered and whether or not it is authenticated.

Current location area ID

M

Identity of the location area from which the access request was received.

Service area ID

C

Identity of the service area (for UMTS access) in use by the served subscriber. Shall be present for UMTS access; otherwise shall be absent.

Serving cell ID

C

Identity of the cell (for GSM access) in use by the served subscriber. Shall be present for GSM access; otherwise shall be absent.

IMSI

C

IMSI of the MS requesting the access. For normal MO call or page response, one of IMSI or TMSI shall be present. For emergency call, one of IMSI, TMSI or IMEI shall be present.

TMSI

C

TMSI of the MS requesting the access. For normal MO call or page response, one of IMSI or TMSI shall be present. For emergency call, one of IMSI, TMSI or IMEI shall be present.

IMEI

C

IMEI of the MS requesting the access. For normal MO call or page response, one of IMSI or TMSI shall be present. For emergency call, one of IMSI, TMSI or IMEI shall be present.

CKSN

C

Cipher key sequence number of the MS requesting the access. Shall be present if TMSI is present; otherwise shall be absent.

CSG Id

C

Identifier of the closed subscriber group. Shall be present if the serving cell is a CSG cell or a hybrid cell.

Cell Access Mode

C

Indicates that the serving cell operates in Hybrid Access mode. Shall be present if the serving cell is a Hybrid cell.

8.1.22 Process Access Request ack

The following information elements are required:

Information element name

Required

Description

IMSI

C

IMSI of the MS requesting the access. For normal MO call or page response, shall be present. For emergency call, one of IMSI or IMEI shall be present.

IMEI

C

IMEI of the MS requesting the access. For normal MO call or page response, shall be absent. For emergency call, one of IMSI or IMEI shall be present.

MSISDN

O

MSISDN of the MS requesting the access.

CSG Membership Status

C

Indicates the Membership status of the UE to a particular CSG. Shall be present if the serving cell is a Hybrid cell.

8.1.23 Process Access Request negative response

The negative response information element can take the following values:

– Roaming not allowed;

– System failure;

– Unidentified subscriber;

– Illegal equipment;

– Illegal subscriber;

– Not authorized for this CSG.

8.1.24 Process Call Waiting

The following information elements are required:

Information element name

Required

Description

MSISDN

M

MSISDN of the MS for which the Process Call Waiting is sent.

PLMN bearer capability

C

Shall be present according to the rules defined in 3GPP TS 29.007 [30].

ISDN bearer capability

C

Shall be present if it was received in the Provide Roaming Number for the waiting call; otherwise shall be absent.

ISDN low layer compatibility

C

Shall be present if it was received in the Provide Roaming Number for the waiting call; otherwise shall be absent.

ISDN high layer compatibility

C

Shall be present if it was received in the Provide Roaming Number for the waiting call; otherwise shall be absent.

CLIP provision

C

Indicates that CLIP is provisioned. Shall be present if CLIP is provisioned; otherwise shall be absent.

CLIR override provision

C

Indicates that the CLIR override subscription option of CLIP is provisioned. Shall be present if CLIP is provisioned with the CLIR override subscription option and the MS is registered in the HPLMN country; otherwise shall be absent.

COLR provision

C

Indicates that COLR is provisioned. Shall be present if COLR is provisioned; otherwise shall be absent.

No Reply Condition Timer

C

Value of timer to be used to determine the No subscriber reply condition. Shall be present if the Call Forwarding on No Reply service is active and operative; otherwise shall be absent.

CUG index

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if the waiting call is a CUG call; otherwise shall be absent.

Advice of Charge provision

C

Indicates whether Advice of Charge (Information) or Advice of Charge (Charging) is provisioned. Shall be present if Advice of Charge is provisioned; otherwise shall be absent.

8.1.25 Process Call Waiting ack

This message contains no information elements.

8.1.26 Process Call Waiting negative response

The negative response information element can take the following values:

– Busy subscriber (UDUB);

– Busy subscriber (NDUB);

– No subscriber reply.

8.1.27 Provide IMEI

This message contains no information elements.

8.1.28 Provide IMEI ack

The following information element is required:

Information element name

Required

Description

IMEI

M

IMEISV (as defined in 3GPP TS 23.003 [5]) of the ME involved in the access request.

8.1.29 Provide IMSI

This message contains no information elements.

8.1.30 Provide IMSI ack

The following information element is required:

Information element name

Required

Description

IMSI

M

IMSI of the MS involved in the access request.

8.1.31 Radio connection released

This message contains no information elements.

8.1.32 Search For MS

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the MS to be paged in all location areas.

Page type

M

Indicates whether the paging is for a circuit-switched call, MT SMS delivery, SS activity or Active Location Retrieval.

Requested information

C

Indicates the information requested by the VLR – one or more of:

– Location;

– MS classmark;

– IMEI.

Shall be present if the Page type is Active Information Retrieval; otherwise shall be absent.

Paging via SGSN possible

C

Indicates that paging via the SGSN is possible. Shall be present if the VLR determines that the MS can be paged via the SGSN; otherwise shall be absent.

TMSI

O

TMSI to be broadcast to identify the MS.

Paging area

O

May be present if the Paging type is circuit switched call, if the Paging Area function is supported and if the paging area is available; otherwise it shall be absent. It indicates the set of Location Areas in which the MS is to be paged on the A interface if Location area ID is not known in VLR.

Call Priority

O

This parameter indicates the eMLPP priority of the call (see 3GPP TS 23.067 [39]). This parameter should be present if the VLR supports the eMLPP feature and if the Call Priority was received in the MAP_PROVIDE_ROAMING_NUMBER request or in the MAP PROVIDE_SUBSCRIBER_INFO request.

8.1.33 Search For MS ack

The following information element is required:

Information element name

Required

Description

Location area ID

M

Location area in which the MS responded to the page.

Serving cell ID

C

Identity of the cell in which the served subscriber is located. Shall be present if the MS uses GSM radio access; otherwise shall be absent.

Service area ID

C

Service area identity of the cell in which the served subscriber is located. Shall be present if the MS uses UMTS radio access; otherwise shall be absent.

MS classmark

M

MS classmark 2 as defined in 3GPP TS 24.008 [26].

IMEI (with software version)

C

IMEISV as defined in 3GPP TS 23.003 [5]. Shall be present if the IMEI was requested in the Page MS message and the MSC retrieved it from the MS; otherwise shall be absent.

8.1.34 Search For MS negative response

The negative response information element can take the following values:

– Absent subscriber;

– Busy subscriber (More calls possible);

– Busy subscriber (NDUB);

– System failure.

The Search For MS negative response Busy subscriber (More calls possible) also indicates the basic service which applies for the established call.

8.1.35 Search for MS via SGSN

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the MS to be paged.

eMLPP priority

O

Circuit-switched paging priority.

TMSI

O

TMSI to be broadcast to identify the MS.

Channel type

O

Type of channel required for the call.

8.1.36 Send Info For Incoming Call

The following information elements are required:

Information element name

Required

Description

MSRN

M

Mobile Station Roaming Number received in the IAM.

Bearer service

C

Bearer service required for the MT call. Shall be present if the MSC was able to derive a bearer service from ISDN BC/LLC/HLC information received in the IAM; otherwise shall be absent.

Teleservice

C

Teleservice required for the MT call. Shall be present if the MSC was able to derive a teleservice from ISDN BC/LLC/HLC information received in the IAM; otherwise shall be absent.

Dialled number

C

Number dialled by the calling subscriber. Shall be present if it was received in the IAM; otherwise shall be absent.

Number of forwarding

C

Number of times the incoming call has already been forwarded. Shall be present if it was received in the IAM; otherwise shall be absent.

CUG interlock

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if it was received in the IAM; otherwise shall be absent.

CUG outgoing access

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if it was received in the IAM; otherwise shall be absent.

MT Roaming Forwarding Supported

C

Indication that the MSC supports the MT Roaming Forwarding feature. Shall be present if the MSC supports that feature, otherwise shall be absent.

8.1.37 Send Info For Incoming Call ack

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the B subscriber.

Forwarded-to number

C

E.164 number of the C subscriber. Shall be present if the call is to be forwarded other than for MT roaming retry reason.

Forwarding reason

C

Indication of why the call has been forwarded (on call deflection, on mobile subscriber busy, on mobile subscriber not reachable or on no subscriber reply). Shall be present if the call is to be forwarded other than for MT roaming retry reason.

Notification to calling party

C

Indication of whether the calling party is to be notified that the call has been forwarded. Shall be present if the call is to be forwarded other than for MT roaming retry reason.

Notification to forwarding party

C

Indication of whether the forwarding party is to be notified that the call has been forwarded. Shall be present if the call is to be forwarded on mobile subscriber busy or on no subscriber reply; otherwise shall be absent.

Forwarded-to subaddress

C

Subaddress of the C subscriber (see 3GPP TS 23.003 [5]). Shall be present if a forwarded-to subaddress is stored in the VLR in association with the forwarded-to number; otherwise shall be absent.

Redirecting presentation

C

Indication of whether the MSISDN of B subscriber shall be presented to the C subscriber. Shall be present if the call is to be forwarded, otherwise shall be absent.

MSISDN

C

E.164 number which identifies the B subscriber. It will be used to create the redirecting number presented to the C subscriber. Shall be present if the call is to be forwarded, otherwise shall be absent.

CUG interlock

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if the VLR has determined that the forwarded call is to be treated as a CUG call in accordance with the rules in 3GPP TS 23.085 [18], otherwise shall be absent.

CUG outgoing access

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if the VLR has determined that the forwarded call is to be treated as a CUG call with outgoing access in accordance with the rules in 3GPP TS 23.085 [18], otherwise shall be absent.

NAEA preferred Carrier Id

O

The preferred carrier identity identifying the carrier to be used to route the interexchange call if the forwarded call requires routing via an interexchange carrier. This parameter may be included at the discretion of the VLR operator.

MT Roaming Retry Indicator

C

Indication that the call is forwarded for MT roaming retry. All other forwarding parameters are not relevant if this IE is present.

MT Roaming Forwarding Indicator

C

Indication that the call is forwarded for MT Roaming Forwarding. All other forwarding parameters are not relevant if this IE is present.

MSRN for MT Roaming Forwarding

C

Mobile Station Roaming Number received in the MAP PROVIDE ROAMING NUMBER response from the new VLR. Shall be present if the MT Roaming Forwarding Indicator is present, otherwise shall be absent.

8.1.38 Send Info For Incoming Call negative response

The negative response information element can take the following values:

– Absent subscriber;

– Busy subscriber;

– CUG reject (Called party SS interaction violation);

– Forwarding violation;

– Impossible call completion;

– No subscriber reply;

– System failure;

– Unallocated roaming number;

8.1.39 Send Info For Outgoing Call

The following information elements are required:

Information element name

Required

Description

Called number

M

E.164 number of the call destination.

Bearer service

C

Bearer service required for the MO call, derived from the PLMN bearer capability information received in the set-up request from the MS. One of bearer service or teleservice shall be present.

Teleservice

C

Teleservice required for the MO call, derived from the PLMN bearer capability information received in the set-up request from the MS or from the emergency set-up request from the MS. One of bearer service or teleservice shall be present.

CUG index

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if it was received in the set-up request from the MS.

Suppress preferential CUG

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if it was received in the set-up request from the MS.

Suppress CUG outgoing access

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if it was received in the set-up request from the MS.

8.1.40 Send Info For Outgoing Call negative response

The negative response information element can take the following values:

– Bearer service not provisioned;

– Call barred (Operator determined barring);

– Call barred (Supplementary service barring);

– CUG reject (Inconsistent access information – index incompatible with basic service);

– CUG reject (Inconsistent access information – no CUG selected);

– CUG reject (Outgoing calls barred within the CUG);

– CUG reject (Unknown CUG index);

– Teleservice not provisioned.

8.1.40A Send UESBI-Iu to Access Network

The following information element is required:

Information element name

Required

Description

IMEI (with software version)

C

IMEISV as defined in 3GPP TS 23.003 [5].

8.1.41 Start security procedures

The following information elements are required for a UMTS connection:

Information element name

Required

Description

CK

M

Ciphering key to be used to cipher communication over the radio link (see 3GPP TS 33.102 [32]).

IK

M

Integrity key to be used to verify the integrity of messages transferred over the radio link (see 3GPP TS 33.102 [32]).

The following information elements are required for a GSM connection:

Information element name

Required

Description

Ciphering mode

M

Indicates whether ciphering of the radio connection is required, and if so which ciphering algorithm is to be used.

Kc

C

Ciphering key to be used if ciphering of the radio connection is required. Shall be present if the ciphering mode indicates that ciphering of the radio connection is required, otherwise shall be absent.

8.1.42 Trace subscriber activity

The following information elements are required:

Information element name

Required

Description

Trace reference

M

Reference number to be included with tracing reports which the VMSC sends to the OMC

Trace type

M

For the definition of this IE, see 3GPP TS 52.008 [3]

8.1.43 Use existing TMSI

This message contains no information elements.

8.1.44 Release MSRN

The following information elements are required:

Information element name

Required

Description

MSRN

M

Mobile Station Roaming Number received with the message RELEASE RESOURCES.

8.2 Messages on the C interface (MSC-HLR)

8.2.1 Send Routeing Info

The following information elements are required:

Information element name

Required

Description

MSISDN

M

MSISDN of the B subscriber (see 3GPP TS 23.003 [5]).

Alerting Pattern

C

Shall be present if received in a Connect operation from the gsmSCF; otherwise shall be absent.

CUG interlock

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if the GMSC received it in the IAM and the GMSC supports CUG, otherwise shall be absent.

CUG outgoing access

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if the GMSC received it in the IAM and the GMSC supports CUG, otherwise shall be absent.

Number of forwarding

C

Number of times the incoming call has already been forwarded. Shall be present if it was received in the IAM; otherwise shall be absent.

ISDN BC

C

ISDN bearer capability. Shall be present if the GMSC received it in the IAM, otherwise shall be absent.

ISDN LLC

C

ISDN lower layer compatibility. Shall be present if the GMSC received it in the IAM, otherwise shall be absent.

ISDN HLC

C

ISDN higher layer compatibility. Shall be present if the GMSC received it in the IAM, otherwise shall be absent.

Pre-paging supported

C

Shall be present if the GMSC supports pre-paging, otherwise shall be absent.

Call Priority

O

This parameter indicates the eMLPP priority of the call (see 3GPP TS 23.067 [39]). This parameter should be present if the GMSC supports the eMLPP feature and if the call is an eMLPP call. The eMLPP priority levels A and B shall be mapped to the Call priority level 0.

8.2.2 Send Routeing Info ack

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the B subscriber (see 3GPP TS 23.003 [5]).

Roaming number

C

E.164 number required to route the call to VMSCB (see 3GPP TS 23.003 [5]). Shall be present if the HLR received it in the Provide Roaming Number ack and the call is not subject to early CF, otherwise shall be absent.

Forwarded-to number

C

E.164 number of the C subscriber. Shall be present if the HLR has determined that the call is to be forwarded, otherwise shall be absent.

Forwarded-to subaddress

C

Subaddress of the C subscriber (see 3GPP TS 23.003 [5]). Shall be present if the HLR has determined that the call is to be forwarded and a forwarded-to subaddress is stored in the HLR in association with the forwarded-to number, otherwise shall be absent.

Notification to calling party

C

Indication of whether the calling party is to be notified that the call has been forwarded. Shall be present if the HLR has determined that the call is to be forwarded, otherwise shall be absent.

Forwarding reason

C

Indication of why the call has been forwarded (unconditionally or on mobile subscriber not reachable). Shall be present if the HLR has determined that the call is to be forwarded, otherwise shall be absent.

Redirecting presentation

C

Indication of whether the MSISDN of B subscriber shall be presented to the C subscriber. Shall be present if the HLR has determined that the call is to be forwarded, otherwise shall be absent.

MSISDN

C

E.164 number which identifies the B subscriber (basic MSISDN). It will be used to create the redirecting number presented to the C subscriber. Shall be present if the HLR has determined that the call is to be forwarded, otherwise shall be absent.

CUG interlock

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if the HLR has determined that the call is to be treated as a CUG call in accordance with the rules in 3GPP TS 23.085 [18], otherwise shall be absent.

CUG outgoing access

C

For the definition of this IE, see 3GPP TS 23.085 [18]. Shall be present if the HLR has determined that the call is to be treated as a CUG call with outgoing access in accordance with the rules in 3GPP TS 23.085 [18], otherwise shall be absent.

NAEA preferred Carrier Id

O

The preferred carrier identity identifying the carrier to be used to route the interexchange call if the call requires routing via an interexchange carrier. This parameter may be included at the discretion of the HLR operator.

8.2.3 Send Routeing Info negative response

The negative response information element can take the following values:

– Absent subscriber;

– Bearer service not provisioned;

– Call barred (Operator determined barring);

– Call barred (Supplementary service barring);

– Call barred (Anonymous Call Rejection);

– CUG reject (Called party SS interaction violation);

– CUG reject (Incoming calls barred within CUG);

– CUG reject (Requested basic service violates CUG constraints);

– CUG reject (Subscriber not member of CUG);

– Data missing;

– Facility not supported;

– Forwarding violation

– Number changed;

– System Failure;

– Teleservice not provisioned;

– Unexpected data value;

– Unknown subscriber.

8.3 Messages on the D interface (VLR-HLR)

8.3.1 Provide Roaming Number

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the B subscriber (see 3GPP TS 23.003 [5]).

MSC number

M

E.164 number which identifies VMSCB (see 3GPP TS 23.003 [5]).

MSISDN

O

E.164 number which identifies the B subscriber.

It shall be present if the following 3 conditions are all satisfied:

1. the MSISDN is different from the basic MSISDN;

2. the subscriber has VT-CSI stored in HLR;

3. the VLR has indicated support for CAMEL Phase 3 or later.

It may be present if the HLR requires it to be included in the call data record.

LMSI

C

Local Mobile Subscriber Identity. Shall be present if the LMSI was sent to HLRB at location updating.

PLMN bearer capability

C

Information to define the PLMN bearer capability required for the call. For alternate speech/facsimile group 3 calls this information element shall contain one PLMN bearer capability, as specified in 3GPP TS 29.007 [30]. May be present if the HLR can determine the required PLMN bearer capability from ISDN compatibility information received in the Send Routeing Info message, or from the MSISDN if a multi-numbering scheme is used; otherwise shall be absent. If the ISDN BC and ISDN LLC IEs are present, the PLMN bearer capability IE shall be absent.

ISDN BC

C

ISDN bearer capability. May be present if the HLR received it in the Send Routeing Info message, otherwise shall be absent. If the PLMN bearer capability IE is present, the ISDN BC IE shall be absent.

ISDN LLC

C

ISDN lower layer compatibility. May be present if the HLR received it in the Send Routeing Info message, otherwise shall be absent. If the PLMN bearer capability IE is present, the ISDN LLC IE shall be absent.

ISDN HLC

C

ISDN higher layer compatibility. Shall be present if the HLR received it in the Send Routeing Info message, otherwise shall be absent.

Alerting Pattern

C

Shall be present if the HLR has determined an alerting category or an alerting level for the MT call configuration; otherwise shall be absent.

Pre-paging supported

C

Shall be present if the HLR has determined that pre-paging is supported in the GMSC and the HLR, otherwise shall be absent.

Paging area

O

Shall be present if the Paging Area function is supported and if the paging area is stored in HLR (see 3GPP TS 23.012); otherwise it shall be absent. It indicates the set of Location Areas in which the MS is to be paged on the A interface if Location area ID is not known in VLR.

Call Priority

O

This parameter indicates the eMLPP priority of the call (see 3GPP TS 23.067 [39]). This parameter should be present if the HLR supports this parameter and if the Call Priority was received in the MAP_SEND_ROUTING_INFORMATION request.

8.3.2 Provide Roaming Number ack

The following information element is required:

Information element name

Required

Description

Roaming number

M

E.164 number required to route the call to VMSCB (see 3GPP TS 23.003 [5]).

8.3.3 Provide Roaming Number negative response

The negative response information element can take the following values:

– Absent subscriber;

– Data missing;

– Facility not supported;

– No roaming number available;

– OR not allowed;

– Unexpected data value.

8.3.4 Provide Subscriber Info

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the subscriber for whom information is requested (see 3GPP TS 23.003 [5]).

LMSI

C

Local Mobile Subscriber Identity. Shall be present if the LMSI was sent to the HLR at location updating.

Requested information

M

Indicates which of the following information the HLR requires:

– location information;

– subscriber state;

– IMEI (with software version);

– MS classmark.

Active location retrieval requested

C

Indicates that the HLR requires active location retrieval. Shall be absent if the requested information does not indicate that the HLR requires location information.

Location Information in EPS Supported

C

Indicates by its presence that Location Information in EPS is supported. Shall be absent if the requested information does not indicate that the HLR requires location information.

Shall be present if the Provide Subscriber Info message is triggered by the receipt of a Any Time Interrogation Request that includes the same IE.

May be present otherwise, if the HLR requires location information and the requesting entity in the HPLMN (e.g. gsmSCF) is known to support Location Information in EPS.

Call Priority

O

Indicates the eMLPP priority of the call (see 3GPP TS 23.067 [39]). Should be present if the HLR supports this parameter and if the Call Priority was received in the MAP_SEND_ROUTING_INFORMATION request.

8.3.5 Provide Subscriber Info ack

The following information elements are required:

Information element name

Required

Description

Location information

C

Information to define the location of the MS: see definition in subclause 8.3.5.1. Shall be present if location information was requested and is available; otherwise shall be absent.

Subscriber state

C

Indicates whether the MS is busy (i.e. engaged on a circuit-switched call), network determined not reachable (IMSI detached or roaming in a prohibited location area) or assumed idle. Shall be present if subscriber state was requested; otherwise shall be absent.

IMEI (with software version)

C

IMEISV as defined in 3GPP TS 23.003 [5]. Shall be present if the IMEI was requested, otherwise shall be absent.

MS classmark

C

MS classmark 2 as defined in 3GPP TS 24.008 [26]. Shall be present if the MS classmark was requested, otherwise shall be absent.

8.3.5.1 Location information

The compound information element Location information consists of the following subordinate information elements:

Information element name

Required

Description

Location number

C

For a definition of this information element, see ITU‑T Recommendation Q.763 [35]. Shall be present if the VLR can derive it from the stored service area identity (for UMTS) or cell global identity (for GSM) or location area identity; otherwise shall be absent. The mapping from service area identity or cell ID and location area to location number is network-specific and outside the scope of the UMTS and GSM standards.

Service area ID

C

Service area identity of the cell in which the MS is currently in radio contact or in which the MS was last in radio contact. Shall be present if the MS uses UMTS radio access and the subscriber record is marked as confirmed by radio contact; otherwise shall be absent. See subclause 7.2.3.5.

Cell ID

C

Cell global identity of the cell in which the MS is currently in radio contact or in which the MS was last in radio contact. Shall be present if the MS uses GSM radio access and the subscriber record is marked as confirmed by radio contact; otherwise shall be absent. See subclause 7.2.3.5.

Geographical information

C

For a definition of this information element, see 3GPP TS 23.032 [7] . Shall be present if the VLR can derive it from the stored service area identity, cell global identity or location area identity; otherwise shall be absent.

Geodetic information

C

This information element corresponds to the Calling Geodetic Location defined in ITU-T Recommendation Q.763 [35]. Shall be present if the VLR can derive it from the stored service area identity, cell global identity or location area identity; otherwise shall be absent.

VLR number

O

E.164 number which identifies the VLR (see 3GPP TS 23.003 [5]). If the HLR receives it from the VLR it shall ignore it.

Age of location information

C

Measured in minutes. Shall be present if available in the MSC/VLR; otherwise shall be absent.

Current Location Retrieved

C

Shall be present when location information was obtained after a successful paging procedure for Active Location Retrieval.

E-UTRAN Cell ID

C

E-UTRAN cell global identity of the cell in which the MS is currently in radio contact or in which the MS was last in radio contact. Shall be present if the MS uses E-UTRAN radio access and the subscriber record is marked as confirmed by radio contact; otherwise shall be absent. See subclause 7.2.3.5.

Tracking area ID

C

Tracking area identity of the cell in which the MS is currently in radio contact or in which the MS was last in radio contact. Shall be present if the MS uses E-UTRAN radio access; otherwise shall be absent. See subclause 7.2.3.5.

8.3.6 Provide Subscriber Info negative response

The negative response information element can take the following values:

– Data missing;

– Unexpected data value.

8.3.7 Restore Data

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the subscriber for whom data are to be restored (see 3GPP TS 23.003 [5]).

LMSI

O

LMSI of the subscriber for whom data are to be restored (see 3GPP TS 23.003 [5]). May be included if required by the requesting VLR.

8.3.8 Restore Data ack

The following information elements are required:

Information element name

Required

Description

HLR number

M

E.164 number which identifies the HLR (see 3GPP TS 23.003 [5]).

MS not reachable flag

C

Indicates whether the VLR should notify the HLR when the MS next establishes radio contact. Shall be present if the corresponding indicator is set in the HLR record for the subscriber; otherwise shall be absent.

8.3.9 Restore Data negative response

The negative response information element can take the following values:

– System failure;

– Unknown subscriber.

8.4 Messages on the F interface (MSC-EIR)

8.4.1 Check IMEI

The following information element is required:

Information element name

Required

Description

IMEI

M

IMEI of the ME whose status is to be checked (see 3GPP TS 23.003 [5]).

8.4.2 Check IMEI ack

The following information element is required:

Information element name

Required

Description

Equipment status

M

Indicates whether the ME is black-listed, grey-listed or white-listed

8.4.3 Check IMEI negative response

The negative response information element can take the following value:

– Unknown equipment.

8.5 Messages on the MSC internal interface

This interface can carry ISUP messages received from the process MT_GMSC or the process ICH_MSC and to be forwarded to a destination exchange, and ISUP messages received from the destination exchange and to be forwarded to the process MT_GMSC or the process ICH_MSC. In addition, it carries the following inter-process messages.

8.5.1 CF cancelled

This message contains no information elements.

8.5.2 Perform Call Forwarding

The following information element is required:

Information element name

Required

Description

Forwarded-to number

M

E.164 number of the C subscriber.

OR call

M

Indicates whether the call which is to be forwarded was subject to basic OR as specified in 3GPP TS 23.079 [13]

8.5.3 Perform Call Forwarding ack

The following information element is required:

Information element name

Required

Description

Forwarded-to number

M

E.164 number of the C subscriber. Note: this number may be different from the Forwarded-to number received in the Perform Call Forwarding, as a result of CAMEL handling.

8.5.4 Perform Call Forwarding negative response

The negative response information element can take the following value:

– Call forwarding failed.

8.6 Messages on the VLR internal interface

This interface carries messages between corresponding instances of the processes PRN_VLR and ICH_VLR. The correlation between the process instances is done by the MSRN.

8.6.1 Call arrived

This message contains no information elements.

8.6.2 PAR completed

This message contains no information elements.

8.7 Messages on the Gs interface

8.7.1 Page MS

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the MS to be paged.

eMLPP priority

C

Circuit-switched paging priority. Shall be present if it was received in the Page MS via SGSN request or Search for MS via SGSN request; otherwise shall be absent.

TMSI

C

TMSI to be broadcast to identify the MS. Shall be present if it was received in the Page MS via SGSN request or Search for MS via SGSN request; otherwise shall be absent.

Location area identity

C

Location area identity of the location area where the mobile is registered, according to the subscriber data in the VLR. Shall be present if the VLR can supply it; otherwise shall be absent.

Channel type

C

Type of channel required for the call. Shall be present if it was received in the Page MS via SGSN request or Search for MS via SGSN request; otherwise shall be absent.

8.7.2 Send MS information

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the MS for which information is required.

Information requested

M

Information required for the specified MS.

8.7.3 Send MS information ack

The following information elements are required:

Information element name

Required

Description

IMSI

M

IMSI of the MS for which information is required.

Service area ID

C

Service area ID (for UMTS access) of the cell in which the MS last established radio contact. Shall be present if the MS uses UMTS access; otherwise shall be absent.

Cell ID

C

Cell ID (for GSM access) of the cell in which the MS last established radio contact. Shall be present if the MS uses GSM access; otherwise shall be absent.

Location information age

M (note)

Time in minutes since the MS last established a radio transaction

NOTE: Although they are optional in the protocol, these IEs are mandatory in this context.

8.7.4 Send MS information negative response

The negative response information element can take the following value:

– No response from SGSN.

8.8 Messages on the E interface (GMSC-VMSC)

8.8.1 Release Resources

The following information elements are required:

Information element name

Required

Description

MSRN

M

Mobile Station Roaming Number.

Annex A (informative):
Handling of an IAM at an MSC

An MSC which receives an IAM from an originating exchange may react in three different ways:

– It acts as a transit exchange, i.e. it relays the IAM to a destination exchange determined by analysis of the called party address, and thereafter relays other telephony signalling between the originating and destination exchange until the connection is released. This behaviour is not specific to UMTS or GSM.

– It acts as a terminating exchange, i.e. it attempts to connect the call to an MS currently registered in the service area of the MSC.

– It acts as a GMSC, i.e. it interrogates an HLR for information to route the call. If the HLR returns routeing information, the MSC uses the routeing information from the HLR to construct an IAM, which it sends to a destination exchange determined by analysis of the routeing information from the HLR.

Sheet 1: when the MSC co-ordinating setup procedure has decided whether the MSC is to act as a terminating VMSC, a GMSC or a transit exchange, it forwards the IAM to an idle instance of the appropriate process.

Figure 84a: Process MSC_Coord (sheet 1)

Annex B (informative):
Change history

Change history

TSG CN#

Spec

CR

Phase

Version

New Version

Subject/Comment

Apr 1999

GSM 03.18

7.0.0

Transferred to 3GPP CN1

CN#03

23.018

3.0.0

Approved at CN#03

CN#04

23.018

001

3.0.0

3.1.0

Notification of Call Forwarding to the gsmSCF

CN#05

23.018

002r4

3.1.0

3.2.0

Addition of the description for Pre-Paging

CN#05

23.018

006

3.1.0

3.2.0

Removal of TDP criteria from Resume Call Handling

CN#05

23.018

007r1

3.1.0

3.2.0

GMSC CAMEL phases in Provide Roaming Number

CN#05

23.018

023

3.1.0

3.2.0

Separation of success & failure cases for OR of late call forwarding

CN#05

23.018

024

3.1.0

3.2.0

Notification of Call Forwarding to the gsmSCF before activating call forwarding process

CN#06

23.018

004r2

3.2.0

3.3.0

Introduction of the Super-Charger Concept in TS 23.018

CN#06

23.018

027r3

3.2.0

3.3.0

Introduction of CAMEL Phase 3

CN#07

23.018

025r7

3.3.0

3.4.0

Addition of the description for Multicall

CN#07

23.018

026r2

3.3.0

3.4.0

Alternative solution for ALR

CN#07

23.018

030

3.3.0

3.4.0

Correction of the SDL diagrams for Pre-paging

CN#07

23.018

032r1

3.3.0

3.4.0

Inclusion of D-CSI check in HLR/VLR

CN#07

23.018

033

3.3.0

3.4.0

Initialization of Backward Call indicator

CN#07

23.018

034

3.3.0

3.4.0

Correction of the result of the procedure CAMEL_ICH_MSC_INIT

CN#07

23.018

037

3.3.0

3.4.0

Clarification of N-CSI in Core NW

CN#07

23.018

039r2

3.3.0

3.4.0

Replacement of references to GSM with references to UMTS

CN#07

23.018

043r1

3.3.0

3.4.0

Clarification of NPDB error detection and MNP specific call handling

CN#07

23.018

044

3.3.0

3.4.0

Setting the Destination Address for MO calls

CN#07

23.018

047

3.3.0

3.4.0

O-CSI and D-CSI checks for ORLCF calls

CN#07

23.018

048

3.3.0

3.4.0

Correction of CF Notification

CN#07

23.018

049

3.3.0

3.4.0

Introduction of Authentication Failure Report

CN#07

23.018

050r3

3.3.0

3.4.0

ISUP release cause value

CN#08

23.018

045r1

3.4.0

3.5.0

Correction of CAMEL Incoming Call Handling

CN#08

23.018

051r4

3.4.0

3.5.0

Improvement of Active Retrieval of Location Information procedure

CN#08

23.018

052r2

3.4.0

3.5.0

North American Service Provider Number Portability impacts for MNP

CN#09

23.018

053

3.5.0

3.6.0

Correction of connector numbering in process ICH_MSC

CN#09

23.018

054

3.5.0

3.6.0

Correction of the SDL diagram for Pre-paging

CN#09

23.018

056

3.5.0

3.6.0

Correction to process ICH_VLR

CN#09

23.018

057r3

3.5.0

3.6.0

Handling of the Call Diversion Treatment Indicator

CN#09

23.018

059r1

3.5.0

3.6.0

Modifications to procedure obtain routeing address.

CN#09

23.018

060

3.5.0

3.6.0

Corrections to process ICH_VLR

CN#09

23.018

061r2

3.5.0

3.6.0

Update of CAMEL references

CN#09

23.018

063r1

3.5.0

3.6.0

Correction of procedure Obtain_Routeing_Address for the reconnect case

CN#09

23.018

055r4

R4

3.6.0

4.0.0

Inclusion of call hold in basic call handling.

CN#10

23.018

064

Rel-4

4.0.0

4.1.0

Tidying up of Process Subs_FSM and inter-process signals

CN#11

23.018

065

Rel-4

4.1.0

4.2.0

Incorporation of MPTY and ECT into the Subs_FSM process

CN#11

23.018

067

Rel-4

4.1.0

4.2.0

Removal of CW descriptions

CN#11

23.018

069

Rel-4

4.1.0

4.2.0

Paging not via the SGSN correction

CN#12

23.018

074

Rel-4

4.2.0

4.3.0

Initialization of variable to monitor activation of CSI’s

CN#12

23.018

072

Rel-5

4.3.0

5.0.0

Handling of MultiCall in MPTY procedure

CN#13

23.018

077

Rel-5

5.0.0

5.1.0

Addition of missing process Update_Location_VLR

CN#13

23.018

Rel-5

5.0.0

5.1.0

Editorial clean up

CN#14

23.018

081

Rel-5

5.1.0

5.2.0

Handling of Reconnect on Leg2 Disconnect

CN#14

23.018

091r2

Rel-5

5.1.0

5.2.0

Corrections in the ATI mechanism description

CN#15

23.018

082r2

Rel-5

5.2.0

5.3.0

Introduction of CAMEL Phase 4

CN#15

23.018

088r2

Rel-5

5.2.0

5.3.0

Handling of CUG calls in non-supporting networks

CN#15

23.018

093r1

Rel-5

5.2.0

5.3.0

MSISDN in Provide Roaming Number in case of MSP

CN#15

23.018

098

Rel-5

5.2.0

5.3.0

Correction on the Active Location Retrieval description

CN#15

23.018

100r1

Rel-5

5.2.0

5.3.0

Transferring the MS classmark & IMEI to the gsmSCF

CN#17

23.018

109r1

Rel-5

5.3.0

5.4.0

Determining the basic service for MT calls

CN#17

23.018

110

Rel-5

5.3.0

5.4.0

Minor corrections to Process ICH_MSC

CN#17

23.018

111

Rel-5

5.3.0

5.4.0

Setting of Leg1_Status variable

CN#18

23.018

112r1

Rel-5

5.4.0

5.5.0

Clarification of requirements for the presence of IEs in messages

CN#19

23.018

118

Rel-5

5.5.0

5.6.0

Correction in the ATI mechanism description

CN#20

23.018

115r2

Rel-5

5.6.0

5.7.0

Stopping No_Answer timer in the case of forwarding notification

CN#20

23.018

122

Rel-5

5.6.0

5.7.0

Release Result from CAMEL_MT_GMSC_Notify_CF

CN#20

23.018

124

Rel-5

5.6.0

5.7.0

Addition of procedure to retrieve UE-specific behaviour data

CN#21

23.018

128

Rel-5

5.7.0

5.8.0

Corrections to "Early UE" handling

CN#21

23.018

133

Rel-5

5.7.0

5.8.0

HLR Interrogation for SCUDIF calls

CN#21

23.018

132

Rel-6

5.8.0

6.0.0

Removal of SIWF material

CN#22

23.018

126r1

Rel-6

6.0.0

6.1.0

Collective CR for Rel-6 Enhanced Dialled Services

CN#22

23.018

135

Rel-6

6.1.0

6.2.0

Incorrect implementation of CR 133

CN#22

23.018

137

Rel-6

6.1.0

6.2.0

Default Basic Service for gsmSCF-initiated calls

CN#25

23.018

141r1

Rel-6

6.2.0

6.3.0

Pre-Paging Resource Optimization

CN#25

23.018

143r1

Rel-6

6.2.0

6.3.0

Add "CAMEL_Stop_TNRy"in Procedure OG_Call_Setup _MSC (sheet 4)

CN#27

23.018

144

Rel-6

6.3.0

6.4.0

Management Based Activation Impacts

CT#28

23.018

145r1

Rel-7

6.4.0

7.0.0

Trunk Originated CAMEL triggering – SDLs

CT#29

23.018

146

Rel-7

7.0.0

7.1.0

Trunk Originated CAMEL: Inter-digit timer stop/reset SDL correction

CT#30

23.018

0147

Rel-7

7.1.0

7.2.0

Incorrect References

CT#33

23.018

0150

Rel-7

7.2.0

7.3.0

Correction to the IC_CUG_Check Procedure

CT#34

23.018

0155

Rel-7

7.3.0

7.4.0

Optional Suppress Terminating Services Bit String in SRI

CT#36

23.018

0157r4

Rel-7

7.4.0

7.5.0

Mobile Termination whilst the MS is moving to another MSC

CT#36

23.018

0159

Rel-7

7.4.0

7.5.0

PLMN BC in PRN for alternate speech/fax – alignment with TS 29.007

CT#37

23.018

0160

Rel-7

7.5.0

7.6.0

Procedure Check_OG_Barring

0162

Missing SRIack negative response to ISUP release cause mapping in GMSC

CT#40

23.018

0163r2

Rel-8

7.6.0

8.0.0

Paging optimization with A/Iu flex

CT#41

23.018

0164r1

Rel-8

8.0.0

8.1.0

eMLPP Priority in MAP SRI, PRN and PSI request

CT#42

23.018

Rel-8

8.1.0

8.1.1

Copyright Notification updated

CT#45

23.018

0166

Rel-8

8.1.1

8.2.0

PSI negative response

CT#46

8.2.0

9.0.0

Update to Rel-9 version (MCC)

CT#47

23.018

0167r4

Rel-9

9.0.0

9.1.0

Mobile Termination on Pre-paging whilst the MS is moving to another MSC

CT#49

23.018

0168r2

Rel-9

9.1.0

9.2.0

SRI Negative Response Error

CT#49

23.018

0170

Rel-9

9.1.0

9.2.0

Correction for SMS via SGs charging

23.018

Rel-9

9.2.0

9.2.1

History table version numbers corrected

CT#50

23.018

0171

Rel-10

9.2.1

10.0.0

MT Roaming Retry

CT#51

23.018

0174r2

Rel-10

10.0.0

10.1.0

Mobile Terminating Roaming Forwarding

CT#51

23.018

0173

Rel-10

10.0.0

10.1.0

MT Roaming Retry and Super Charger

CT#52

23.018

0180

Rel-10

10.1.0

10.2.0

Paging optimization with A/Iu flex

CT#52

23.018

0175r3

Rel-10

10.1.0

10.2.0

Mobile Terminating Roaming Forwarding for Pre-paging

CT#52

23.018

0176

Rel-10

10.1.0

10.2.0

New LMSI handling for MTRF

CT#52

23.018

0177r1

Rel-10

10.1.0

10.2.0

SDL changes for MTRF after retrieval of routeing information

CT#52

23.018

10.2.0

10.2.1

Editorial correction of overlapping CRs C4-111418 and C4-111415 implementation after CT#52. 5.2.4 was re-numbered as figure 4d in order to align with previous figure number in serction 5.2.3.

CT#53

23.018

0181r1

Rel-11

10.2.1

11.0.0

Addition of Anonymous Call Rejection in the CS domain

CT#53

23.018

0182r2

Rel-11

10.2.1

11.0.0

HLR/HSS domain selection function alignment with Stage 2 requirement

CT#54

23.018

0188r1

Rel-11

11.0.0

11.1.0

Provide Subscriber Information handling for UE under LTE

CT#54

23.018

0183r1

Rel-11

11.0.0

11.1.0

Cause code mapping

CT#54

23.018

0185

Rel-11

11.0.0

11.1.0

CSG access control in CS domain

CT#55

23.018

0189r4

Rel-11

11.1.0

11.2.0

Termination of VT-CSI Dialogue during MTRR and MTRF Procedures

CT#56

23.018

0190r1

Rel-11

11.2.0

11.3.0

MTRF upon establishment of SGs association

CT#56

23.018

0191r1

Rel-11

11.2.0

11.3.0

Subclause number correction on MTRF

CT#59

23.018

0195r3

Rel-11

11.3.0

11.4.0

MTRF for normal 2G and 3G MT call

CT#59

23.018

0193r1

Rel-12

11.4.0

12.0.0

MTRR for normal 2G/3G MT call

CT#59

23.018

0196r1

Rel-12

11.4.0

12.0.0

MTRF for normal 2G and 3G MT call

CT#60

23.018

0197

Rel-12

12.0.0

12.1.0

MM Abort intead of CM Service Reject after CM service acceptance

CT#61

23.018

0198r2

12.1.0

12.2.0

MTRF Optimal Routing when the GMSC and new MSC/VLR are the same node

CT#70

23.018

Rel-13

12.2.0

13.0.0

Update to Rel-13 version (MCC)

2017-03

23.018

Rel-14

13.0.0

14.0.0

Update to Rel-14 version (MCC)

2018-06

23.018

Rel-15

14.0.0

15.0.0

Update to Rel-15 version (MCC)